Elias flotron and francois barthelemy alfred royer de la



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B. FLOTRON & F. B. A. ROYER DE LA BASTIE.

SUBMARINE 0R SUBTERRANEAN ELECTRIC CABLE.

No. 398,823. Patented Dec. 4, 1888.

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WITNESSES: IN%W 3M9. wwflm By mum M ATTORNEYS.

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UNITED STATES PA ENT OFFICE.

ELIAS FLOTRON AND FRANCOIS EAR'FEELEMY ALFRED ROYER DE LA BASTIE, oF PARIS, FRANCE.

SUBMARINE AND SUBTERRANEAN ELECTRIC CABLE.

SPECIFICATION forming part of Letters Patent N0. 393,823, dated December 4, 1888.

Application filed December 12, 1885. $erial No. 185,457. (No modeld Patented in India January 14, 1884, No. 41; in France April 29,1885,N0.168,581; in England November 28, 1885, No. 14,633; in Belgium November 28,1885, No. 71,023; in Portugal December 24, 1886, No. 1,016; in Italy December 31, 1885,

and No. 10,767, and in Spain March 23, 1886, OGXGI, 8,289.

XXXVIII, 216; in Austria-Hungary March 18, 1886, No. 48,365

To all whom it may concern:

Be it known that we, ELIAS FLOTRON and FRANQOIS BARTHELEMY ALFRED ROYER DE LA BASTIE, of the city of Paris, France, have Submarine and Subterranean Electric Cables, of which the following is a full, clear, and exact description, and for which we have obtained Letters Patent in France, No. 168,581, for fifteen years, dated April 29, 1885; in England, for fourteen years, dated November 28, 1885, No. 11,633; in Belgium, for fifteen years, dated November 28, 1885, No. 71,023; in Portugal, for fifteen years, dated December 24, 1885, No. 1,016; in Italy, for fifteen years, dated December 31, 1885, 1'0. 211;, Vol. 38; in India January 14:, 1881, No. 11; in Spain, for ten years, dated March 23, 1886, L. 291, No. 8,289; and in Austria-llungary, for fifteen years, dated March 18, 1880, No. 18,305 and No. 10,767.

This invention relates to an improved con struction of deep-sea and underground cable for the t'ansmission of electric currents for telegraphic, telephonic, lighting, and other purposes.

The chief feature of novelty consists in the employment of short rings of toughened glass for separating and insulating the wires as well as for the external sheathing.

Figure 1 is a cross-section of my improved cable. Fig. 2 is a side view, partly in section, of same. Fig. 3 is a cross-section of a modification; Fig. l, a side view, partly in section, of same. Figs. 5 and 6 are end views of the outer glass rings.

The cable is formed, in the first place, of a core, 0, of toughened or ordinary glass, composed of disks or short lengths or sections of any suitable dimensions, either star-shaped in cross-section, as in Fig. 1., or perforated for the passage of the wires, as in 3. Over the star-shaped core, Fig. 1, serving to separate and hold the conducting-wires b, is placed an inner envelope a, of glass, in the form of short tubes, rings, or half-rings cemented together and serving to inclose the wires in the wires in position. invented new and useful Improvements in grooves of the core. In Fig. 8 the inner envelope a dispensed with, the perforated core 0 serving both to separate and retain the In either case a waterproof coating of india-rubber, gutta-percha, or a composition of mineral pitch and silica is applied hot upon a serving or packing, d, of cotton tapes wound spirally in opposite directions upon the cable; or silk tapes coated with linseed-oil and resin may be employed with advantage.

To protect the cable from the attacks of marine insects, the insulating material is coated with a poisonous paint composed of a mixture of Prussian blue and turbith, which under the action of sea-water becomes avery powerful poison. The whole is then inclosed in an external sheathing, j, which may consist of one, two, or more superposed rings or tube-sections of glass united together by a sort of bayonet-joint formed of tongues e on one ring or section entering grooves 711 of the adjoining ring and partially rotated the one on the other. A cable thus constructed is sufficiently flexible to be coiled and transported without difficulty, and is capable of resisting blows, tension, or pressure.

Although any suitable materialsuch as glass, porcelain, or ceramic pastesmay be employed for making the insulating and separating core and the protective sheathings in the manufacture of the cables as herein described, it is preferred to use for the purpose toughened flint or other glass, the physical and mechanical properties of which permit of obtaining results unattainable with other materials, including ordinary glass.

We claim 1. A flexible cable consisting of inner notched or perforated disks of toughened glass, c, which hold the conductors and outer short glass rings u, substantially as herein shown and described.

2. A flexible cable consisting of inner notched or perforated disks of toughened glass, 0, which hold the conductors, short glass rings a around the same, flexible packing d around said rings a, and outermost short glass tric cables signed by us this 27th day of Nois rings around said packing, as specified. vember, 1885. leis-512% 13355???efiifiiili iliis, 3233 gggg gg gggg ALFRED 5 bined with an outer flexible packing, (Z, and

outermost short pieces of glass, f, substantially as herein shown and described. I Vitnesses:

ROYER DE LA BASTIE.

ROBT. M. HOOPER, ALBERT MOREAU.

The foregoing specification of our improvements in submarine and subterranean elec- 

